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Jurnal Penelitian Saintek

saintek
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Published by Universitas Negeri Yogyakarta

ISSN : 14123991 EISSN : 25287036 DOI : 10.21831

Core Subject : Science,

Decision Sciences, Operations Research & Management

Arjuna Subject : -

Articles 286 Documents

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ELECTRONIC BANKRESEP DEVELOPMENT USING DATA BASE MySQL (STRUCTURED QUERY LANGUAGE) Endang Mulyatiningsih; Ilmawan Ilmawan; Sri Palupi
Jurnal Penelitian Saintek Vol 16, No 1: April 2011
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Penelitian ini bertujuan mengembangkan bank resep masakan elektronik. Bank resep dikembangkan dengan menggunakan sistem basis data resep masakan yang dapat diisi dan died it oleh pengguna. Penelitian menggunakan metode penelitian dan pengembangan. Tahap pertama, kegiatan penelitian meliputi analisis kebutuhan, desain, pembuatan prototype dan alpha testing. Tahap kedua, kegiatan penelitian dilakukan untuk up grading program, pelatihan kepada pengguna dan betha testing. Pengguna yang dilatih sebanyak 25 orang. Kegiatan pelatihan dievaluasi menggunakan model evaluasi 4 level reaction, learning, behaviour, and result dari Krickpatrick. Data dikumpulkan menggunakan kuesioner dan observasi. Analisis data dilakukan secara deskriptif kuantitatif dan kualitatif. Hasil penelitian berupa bank resep masakan yang berisi resep Masakan dan Kue Nusantara, Masakan Oriental dan Kontinental. Pelatihan pengisian data bank resep masakan mendapat reaksi yang baik dari pengguna. Semua pengguna telah mampu menjadi admin yang bertugas mengisi, menambah sub domain dan mengedit resep masakan. lsi bank resep masakan telah layak untuk digunakan dan disebarluaskan. Kata kunci: Bank resep, resep masakan, database resep, MySQL

THE INFLUENCE OF WIRE PITCH TO THE WIRE AND TUBE HEAT EXCHANGER EFFICIENCY IN FREE CONVECTION I Made Arsana
Jurnal Penelitian Saintek Vol 21, No 2: Oktober 2016
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Wire and Tube heat exchanger consists of coiled tube and wire sticked on the two sides of it in normal direction of the tube. The ability of this heat exchanger to dissipate heat is shown by the overall surface efﬁ ciency from array of ﬁ ns or called as heat exchanger efﬁ ciency. The wire which functions as a ﬁ n is the expansion of the outer surface of tube, so that it expands the surface of free convection heat transfer and transfers heat from the heat exchanger to the outside surroundings. The ﬁ n efﬁ ciency commonly depends on its material, geometry and environment where it is used. In this research, the inﬂ uence of the wire pitch to the heat exchanger was examinated. Tthree designs of the heat exchanger with different wire pitch namely (pw/Lw = 0.015; pw/Lw = 0.029 dan pw/Lw = 0.044) were tested into ﬁ ve levels of entrance ﬂ uids temperature (40, 50, 60, 70, and 80 0 C). The ﬁ nding of this study was that the heat exchanger pw/Lw = 0.029 evenly produced the highest efﬁ ciency.

PERFORMANCE OPTIMIZATION OF BEAM CONCRETE BEAMS TO INCREASE BUILDING STRUCTURE PERFORMANCE IN EARTHQUAKE AREA Agus Santoso; Slamet Widodo; Nuryadin Eko Raharjo
Jurnal Penelitian Saintek Vol 15, No 2: Oktober 2010
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

The paper summarizes the experimental result of flexural capacity of full scale reinforced concrete beam prepared as a composite members consisting of two concrete layers made of Hybrid Fiber Reinforced Concrete (HFRC) and High Strength Concrete (HSC). Compressive strength and modulus of elasticity test, splitting tensile, flexural tensile tests conducted to identify the important mechanical properties of both HFRC and HSC. Every mechanical properties data collected using 3 standard samples based on ASTM and SNI codes. 15 reinforced concrete beams in 150x250x2400 mm dimensions, usedfor full scale flexural test of structural RC beam. The tests conducted on 5 types of composite beam: 100%, 75%, 50%, 25%, and 0% of HSC cross sectional depth, combined with HFRC for the opposite sides.The experimental results indicated that HFRC shows higher modulus elasticity compared with HSC, it was 28618,611MPafor HFRC, and 21790,660 MPafor HSC. All types of composite members and full depth of HFRC shows higher first crack load capacity compared with HSC structural reinforced concrete beam. The first crack load capacity increase ranging from 29,753% up to 33,267%. All types of composite members and full depth of HFRC also shows higher maximum load capacity compared with HSC structural reinforced concrete beam. The first crack load capacity increase ranging from 11,284% up to 16,03%. Based on the experimental test results, it can be suggested to apply partial depth of HSC and HFRC; 50% HSC and 50% HFRC on static determinate RC beam.Keywords: Composite Reinforced Concrete Beam, HFRC, HSC, Full Scale Flexural Test

PROBIOTIC DEVELOPMENT OF ACID BACTERIA OF LUBRICATED POTENTIAL WASTE REDUCING CHICAGEN CHOLESTEROL BEHAVIOR BROILER STRAIN HABBART Astuti Astuti
Jurnal Penelitian Saintek Vol 15, No 1: April 2010
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

The aims of rhis research is to .\/reptococcus thermophillus .from .fintl thc in.fluence of gifing lsctlate probiotic B,4L The.fish waste trn'ard the broilers' cind the degree Oj bt"oilers't'holesterol. The research matertals iu'e qppearance of wool ."/() roosters oi broiler Sn'ain Lohntttnn, produclion of PT \v{ilii Breeder Adirama at theage of I tt,eek. The probiotic ttJ isolate tt'eatmeill of Lacture,lcid Bqcteria (BAL) whichis used in this research is Streptococcusthernrcphillus bacteria in .from of Jt eeze Cying tthich contes lj'om llutrition Biochemical Laboratory, Vete.rinary Faculry of UGfut. The treatrnentI isas the control (u'ithctrtt BAL), the rumther o/ BAL in treatment II i.s 106 CFUhnl, the rnunberofBALintreatmentlllisl0 CF'Lt,'rnl,thentttnberafBALintreatmentlVisl0s CFLI/wl. The data collection Jitr the degree of cholesterol is done aJier 28 days. The data which is collected of woo{and the degree of broilers'cholesterol. The research result; lhe treatment of giving lactate trcid bac:teria o.f Streptococctrs thermophillus caused the decrease ofthe degree ofbroilers'cholesterol signilicantll, dnd the best level ofB.4L is I 0^ C FL':nrl

OPTIMIZATION OF BISULFIT SALT CONCENTRATION ON COCONUT QUALITY CONTROL OF COCONUT Ellya Indahyanti; Budi Kamulyan; Bambang Ismuyanto
Jurnal Penelitian Saintek Vol 19, No 1: April 2014
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Bisulphite salt is an additive that usualy added into foodstuff, it was used in order to take a preservation effects. In this research, it was added into coconut sap. The aim of this research was to study the effects of sodium bisulphite adding for increasing coconut sap quality, including pH, reducing sugar and sucrose content. In addition, the rate of sucrose hydrolysis with and without bisulphite have been compared. The volumetric method, i.e Lane-Eynon procedure was used for determining the sugar contents while the hydrolysis rates were measured by polarimetry. The results showed that bisulphite added into coconut sap could repress sucrose hydrolysis.

RESPONSE OF TURMERIC EXPLANT ON CYTOKININ AND AUXIN IN MURASHIGE AND SKOOG Mita Indriani; Erni Suminar; Noladhi Wicaksana; Denny Sobardini; Sulistyaningsih Sulistyaningsih; Anne Nuraini; Nursuhud Nursuhud; Syariful Mubarok
Jurnal Penelitian Saintek Vol 24, No 1: April 2019
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

This study was aimed at determining the concentration of several types of cytokinins and auxin for the induction of turmeric shoots in vitro. The research was conducted at the Tissue Culture Seed Technology Laboratory, Faculty of Agriculture, Padjadjaran University, Jatinangor. The study was conducted from October 2017 to February 2018. The source of planting material is in the form of shoots from the turmeric rhizome. The source of explants or planting material came from the field collected at the Tissue Culture Seed Technology Laboratory, Faculty of Agriculture, Padjadjaran University. Explants were taken from rhizome buds with a size of 0.6-2.0 cm. The experiment used a Completely Randomized Design which was analyzed using the Student’s T-test method. The number of experimental and control groups in this study were seven groups. Variation in treatment with different BAP, thidiazuron, zeatin, and NAA concentrations in each group. The results show that Thidiazuron 1 mgL-1 + NAA 1 mgL-1 gives better results on the percentage of live explants and number of shoots on turmeric plants (Curcuma domestica Val.) Clones 41 at the age of 14 weeks after planting.RESPONS EKSPLAN KUNYIT PADA SITOKININ DAN AUKSIN DALAM MEDIA MURASHIGE DAN SKOOGPenelitian ini bertujuan untuk mendapatkan salah satu konsentrasi dari beberapa jenis sitokinin dan auksin untuk induksi tunas kunyit secara in vitro. Penelitian dilakukan di Laboratorium Kultur Jaringan Teknologi Benih, Fakultas Pertanian, Universitas Padjadjaran, Jatinangor. Waktu pelaksanaan penelitian ini dimulai pada awal bulan Oktober 2017 sampai bulan Februari 2018. Sumber bahan tanam berupa tunas dari rimpang tanaman kunyit. Sumber eksplan atau bahan tanam berasal dari lapangan yang dikoleksi di Laboratorium Kultur Jaringan Teknologi Benih, Fakultas Pertanian, Universitas Padjadjaran. Eksplan diambil dari mata tunas rimpang dengan ukuran 0,6-2,0 cm. Percobaan menggunakan Rancangan Acak Lengkap yang dianalisis menggunakan metode Student’s T-test. Jumlah kelompok eksperimen dan kontrol dalam penelitian ini adalah tujuh kelompok. Variasi perlakuan dengan penambahan konsentrasi BAP, thidiazuron, zeatin, dan NAA yang berbeda pada setiap kelompok. Hasil penelitian ini menunjukkan bahwa Thidiazuron 1 mgL-1 + NAA 1 mgL-1 memberikan hasil yang lebih baik pada persentase eksplan hidup dan jumlah tunas pada tanaman kunyit (Curcuma domestica Val.) klon 41 pada umur 14 MST (Minggu Setelah Tanam).

PROSPECTIVE SECONDARY METABOLITE OF FAMILI SIMAROUBACEAE Ari Widiyantoro
Jurnal Penelitian Saintek Vol 19, No 2: Oktober 2014
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Simaroubaceae family is a family group of plants that have a primary compound content quasinoids and alkaloids. Family Simaroubaceae spread in tropical regions of Asia, Africa and America. In Asia, family Simaroubaceae widely spread in Southeast Asia, especially Indonesia, Thailand, Vietnam and Malaysia. Some of the families of plants contain secondary metabolites that show promising prospects for use in the fields of health and agriculture that plants are pasak bumi (Eurycoma longifolia Jack), fruit macassar (Brucea javanica L. Merr) and pauh kijang (Irvingia malayana Oliv. Ex. A. Benn). Several compounds were isolated to antiinflamatory test by reduction of inflammation after induced carrageenan, antioxidants test by inhibition of NBT reduction and insecticidal test by antifeedant test on leaf object. The results showed eurycomaside compound from ethyl acetate fraction of the stem bark of Eurycoma longifolia Jack is antiinflammatory by reducing inflammation of 23.56±0.89% after the 10th hour. Dehydrobrusatol compound from ethyl acetate fraction of Brucea javanica L. Merr showed antioxidant activity by inhibition of NBT reduction of 87.65±1.09%. Friedelin compound from the ethyl acetate fraction of the stem bark of Irvingia malayana Oliv ex. A. Benn showed insecticidal activity is antifeedant activity of concentration of 2% with a ratio of 90.65±4.34.

MODIFIKASI KAIN AKTIF ANTIBAKTERI BERBASIS KOMPLEK Mn(II) BASA SCHIFF KITOSAN–SALISILALDEHID Ismiyarto - Ismiyarto; Sesika Novari; Ngadiwiyana Ngadiwiyana; Purbowatiningrum Ria Sarjono; Noor Basid Adiwibawa Prasetya
Jurnal Penelitian Saintek Vol 25, No 1 (2020)
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Penelitian ini bertujuan untuk memperoleh kompleks Mn(II)-basa Schiff kitosan-salisaldehida dan menguji aktivitasnya sebagai bahan aktif kain antibakteri. Metode penelitian dilakukan melalui tiga tahapan. Pada tahap pertama dilakukan sintesis basa Schiff kitosan–salisilaldehid dengan mereaksikan kitosan dengan variasi mol salisilaldehid menggunakan campuran pelarut asam asetat dan etanol, diaduk pada suhu 50oC selama 6 jam. Pada tahap kedua, basa Schiff kitosan–salisilaldehid dijadikan kompleks dengan MnCl2.2H2O menggunakan campuran pelarut asam asetat 2% dan etanol, diaduk pada suhu 60oC selama 12 jam. Pada tahap ketiga dilakukan pelapisan kompleks pada kain katun menggunakan metode spray dan selanjutnya dilakukan uji antibakteri terhadap E. coli (G-) dan S. aureus (G+) menggunakan metode difusi cakram. Hasil penelitian menunjukkan bahwa basa Schiff kitosan–salisilaldehid dengan rasio substitusi paling besar (0,122) diperoleh ketika disintesis menggunakan salisilaldehid 0,00227 mol. Senyawa kompleks Mn(II)-basa Schiff kitosan–salisilaldehid yang terbentuk berupa serbuk berwarna hitam dengan rendemen 66%. Kain katun yang telah dilapisi kompleks Mn(II)-basa Schiff kitosan–salisilaldehid efektif menghambat pertumbuhan bakteri dengan persen daya hambat sebesar 16,02% terhadap bakteri E. coli (G-) dan 14,02% terhadap bakteri S. aureus (G+).MODIFICATION OF ANTIBACTERIAL FABRIC FROM Mn(II) SCHIFF BASE CHITOSAN - SALICYLALDEHYDE COMPLEXThis study was aimed at obtaining the complex of Mn(II)-Schiff base chitosan- salicylaldehyde and evaluating the activity of antibacterial agent on cotton fabric. The study was conducted through three treatment steps. In the first step, chitosan-salicylaldehyde Schiff base was synthesized by reacting chitosan with mole variations of salicylaldehyde and combined with a mixture of acetic acid and ethanol as the solvent which was then stirred at 50oC for 6 hours. In the second step, preparation complexes Mn(II)- Schiff base chitosan-salicylaldehyde was conducted by mixing chitosan-salicylaldehyde Schiff base and MnCl2.2H2O using acetic acid 2% -ethanol as a solvent at 60oC for 12 h. In the third step, the complex was coated onto fabric using spray method and the E. coli (G-) dan S. aureus (G+) antibacterial test was done to the coated fabric using disk diffusion method. The results showed that 0.00227 mole salicylaldehyde lead to the highest substitution ratio of Schiff base chitosan-salicylaldehyde of 0.122. The Mn(II)-Schiff base chitosan-salicylaldehyde complex was obtained as black powder with a yield of 66%. Cotton fabric that has been coated with the complex, effectively inhibits bacterial growth with a percent inhibition against E. coli (G-) and S. aureus (G+) bacteria of 16.02% and 14.02%, respectively.

CHANGES OF COLOR AND P-KAROTEN RATE IN THE UBI.JALAR (IPOMEA BATATAS, L) FLOWS BLEACHING Regina Tutik Padmaningrum; M. Pranjoto Utomo
Jurnal Penelitian Saintek Vol 12, No 2: Oktober 2007
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

he researh to stuJlythe influence of the kinds and the concentrations of bleach solution to the co1lientof fJharoten and the color ofjaw a sweet potato flour has been done. Yellowjawa sweet potato was used in this reseach. This reseon:h was a descripstive qualitative research. The subject of the researdt was jawa sweet potato and the object was jawa sweet potato flourquantities including the content of fi-charotenand the color of theflour.. TIre independen: variables were the kinds .and the concentrations of bleach solution. and the dependent variableswere the con/ell!offJ-charoten ami.the color ofjawa sweet potato flour. In 1.00% bleach solllliDn. the costen: of fi-charoten with sodium sulfite, sodium bisulfite. Co(OHJ!l. ascorbic acid were: 2.18985,1.40835, 2.25795 and 0.78315 mgllOO grams flour respectively. In1.00% bleach solution. the color of soaked jawa sweet potato flour in sodium sulfite, sodium bisulfite,. Ca(OH);]ascorbic acid were: red (R= 0.3) =yellow (Y = 0.7). red (R = O.2)-yeJlow (Y = 0.5), red (R = 0.5)-yellow(Y= 1.0)andred(R=0.1)-yeHow(R = 1.2) respectively. Theresearch showed that the concentration of bleach solution influencedsignificantly the content of fJ-cIwroten and the color of jawa sweet potato flour. The concentration ofbead: solution tat yielded the bigest content offJ-charotenwas LOW"".

CHANGE OF TOTAL PROTEINS AND LOTEST PROTEINS DURING TEMPE KACANGTOLO FERMENTATION PROCESS Nani Ratnaningsih
Jurnal Penelitian Saintek Vol 12, No 1: April 2007
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Kacang tolo (Vigna unguiculata) have potency as protein source instead soybean with appropriate processing such as fermentation of tempe. The objective of research was to study the nutrient changing especially total protein and digestible protein content during fermentation of tempefrom kacang tolo. The research method was the experimental method with complete block design. Watercontent was analyzed by thermogravimetry, total protein by micro Kjieldahl, and digestible protein by in vitro method. Data were analyzed by one way anova at significant level 5 %. If there are significant different, then is followed with Duncan Multiple Range Test (DMRT). Research result concluded that water content, total protein content, and digestible protein were increasing during tempefermentation.

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